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Regularly water crops in pots and growing bags, daily if needed in warm weather Plant trailing tomatoes in hanging basketsFeed young plants weekly with a solution of liquid fertiliserVentilate the greenhouse during the day, but close vents

Tie greenhouse tomatoes to their supports as they growFeed plants with full-strength fertiliser solution once a week, or apply a more diluted feed every few daysApply shading paint or put up shade netting or blindsOpen doors and vents daily

Train cucumbers and prune back sideshootsPick off flowers on coleus to maintain their colourful leavesWater tomatoes regularly to prevent fruits from splittingTake cuttings from fuchsias, coleus, pelargoniums, marguerites and other tender perennials

Feed tomatoes in growing bags and pots with a liquid high-potash fertiliser Plant nerines, lachenalia and veltheimia bulbs in potsTake leaf cuttings from begonias, Cape primroses and African violetsSow winter lettuces in potsPot up clumps of chives

Monty Don explains the best methods of harvesting fruit from cucumber plants, with tips on recognising and removing male flowers.summerMore advice on growing fruit and vegMonty's video demonstration of how to harvest carrotsSowing beetroot seeds

Remove blanket weed from pondsAround the gardenLift, divide and replant congested flag irises after floweringDeadhead border perennialsPick dead flowers off rhododendronsFlowersSow cabbages to pick as spring greensThin heavy crops of apples, pears

wisteria, shortening long sideshootsFlowersHarvest young marrows but leave some to fully ripenPinch out the tops of outdoor tomatoesPlant out rooted strawberry runners into new bedsFruit & vegFeed tomatoes in growing bags and pots Plant nerines, lachenalia

greenhouse tomatoes to deter whiteflySet up a 'watering bench' using capillary matting to look after pot plantsSow seeds of Christmas cherry (solanum) to grow as winter pot plantsHang yellow sticky traps in the greenhouse to help control whitefly Thin out

of hardy annual flowers Lightly clip box edging and topiary to neaten them upFlowersPush twigs into the ground to support tall-growing peasFeed strawberries with a high potash feedSow flowering companions in your veg plotFruit & vegPlant tomatoes in large

Plant sweetcorn All the juicy sweetness in corn cobs is lost if you don't eat them within (literally) minutes of harvesting - so you really will only ever experience sweetcorn as it should be when you grow your own. All they need for success is sun